US 6,625,498 B1Granted

Numerical control system

AssigneeFanuc Corporation

InventorsMitsuo Kurakake, Kentaro Fujibayashi, Seiji Akashi

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Abstract

In a master unit, clock signals from a clock are counted by a counter, and clock data is generated. This clock data is outputted to a slave unit by a driver, and stored in clock data storage memory. The slave unit stores clock data received by a receiver in the clock data storage memory. A processor for a program controller of the master and slave units starts up, and executes the synchronized operation of an operating program of axes that are synchronized on the basis of clock data stored in the clock data storage memory. It is also possible to commence operation of an axis under other conditions without relying on clock data. If override is applied to clock data, override will apply only to an axis that is synchronized and operated in accordance with clock data.

Claims20

Dependent claims

A numerical control system which comprises one numerical control device constituting a master unit, and one or more numerical control devices constituting slave units, and the axes controlled by these different numerical control devices are controlled in synchronism with each other, the numerical control system comprising:

a master unit comprising:
a clock data generating unit generating clock data by counting a clock signal from a clock by either counting up or counting down at a prescribed time interval;
a transmitting unit transmitting the clock data generated by said clock data generating unit to said slave unit from said master unit;
a master storage unit storing a program including motion commands of an axis controlled by this master unit;
and
a master starting unit starting up said program based on said clock data;
each of said numerical control devices constituting slave units comprising:
a slave storage unit storing a program including motion commands of an axis controlled by each slave unit;
and
a slave starting unit starting up said program based on said clock data from said master unit.

7 more elements

Dependencies are inferred from the claim text.